Datasheet Diodes AL8862Q — 数据表

AL8862Q
AUTOMOTIVE GRADE 55V 1A STEP-DOWN CONVERTER Description Pin Assignments
(Top View) The AL8862Q is a step-down DC/DC converter designed to drive
LEDs with a constant current. The AL8862Q operates with an input
supply voltage from 5V to 55V and provides an externally adjustable
output current up to 1A. Series connection of the LEDs provides
identical LED currents resulting in uniform brightness and eliminating
the need for ballast resistors. The AL8862Q switches at frequency up
to 1MHz. This allows the use of smaller size external components,
hence minimizing the PCB size.
The AL8862Q integrates the power switch and a high-side output
current sensing circuit. Maximum output current of AL8862Q is set
via an external resistor connected between the VIN and SET input
pins. Dimming is achieved by applying either a DC voltage or a PWM
signal at the CTRL input pin. The soft-start time can be adjusted
using an external capacitor from the CTRL pin to the ground. An
input voltage of 0.3V or lower at CTRL pin will shut down the power
switch. 8 CTRL 7 GND 3 6 SW 4 5 SW SET 1 GND 2 FAULT
VIN EP SO-8EP Applications Automotive Interior LED Lamps
Automotive Exterior LED Lamps The AL8862Q is qualified to AEC-Q100 Grade 1 and is automotive
grade to support PPAPs. Features Wide Input Voltage Range: 5V to 55V
Output Current up to 1A
Internal 55V NDMOS Switch …